liquidtite
Senior Member
- Location
- Ny
Working on a site were there's existing 277v pole lights
They ran 2/0 feeders through boxes and then taped 10awg to the lights with little fusses .
today we came to wrk and circuit was tripped .
we already replaced a lot of the lighting when the diggers hit conduits with excavator
so we thought that would be the case but no one was digging over nite .
we isolated were the short was by unplicing mid section of jbox seeing if it holds and working our way down stream .
we ended up Un splicing a phase towards end of the line and the circuit held .
luckily down stream no lights were using that phase so we just left unspliced
at that point .
all lights were on and held for hours .
at end of day the circuit tripped no diggers on site .
we set breacker again and it held .
dont understand why breacker would hold for hours then just trip .
Was thinking maybe nick in wire and water mite be messing with it.
Or bad ocp.
any thoughts on this would help
thank you
They ran 2/0 feeders through boxes and then taped 10awg to the lights with little fusses .
today we came to wrk and circuit was tripped .
we already replaced a lot of the lighting when the diggers hit conduits with excavator
so we thought that would be the case but no one was digging over nite .
we isolated were the short was by unplicing mid section of jbox seeing if it holds and working our way down stream .
we ended up Un splicing a phase towards end of the line and the circuit held .
luckily down stream no lights were using that phase so we just left unspliced
at that point .
all lights were on and held for hours .
at end of day the circuit tripped no diggers on site .
we set breacker again and it held .
dont understand why breacker would hold for hours then just trip .
Was thinking maybe nick in wire and water mite be messing with it.
Or bad ocp.
any thoughts on this would help
thank you